Intaglio printing press



Jan. 13, 1931. o c, VROEVSEN INTAGLIO PRINTING PRESS N Original FiledNov. 10, 1927 Q ANN der and the folder.

I Patented Jan. 13,..1931

-UNlT-ED STATES] oscARoHARLEs 3013813111, or BROOKLYN, nnwxoamnssrenonTO woon nnwsragmt menmnny oonromrron, or new. Yonx, n.1, A oonronarronorivmenrra INTAGLIO rnmrrne tease if Application filed November 10,1927, serial'nb. 252, 03,; sk -g ma .11, 19,80.

' The principal objects of this invention are to provide means foreliminating the lack of register between the first and second impressioncylinders of an intaglio printing 5 press due to the shrinking of theweb after the first impression and to provide for shrinking the paperbefore it is sent through the, first air of printing cylinders so thatboth the first and second printing cylinders n 10 may be made of thesame diameter, therebyeliminatin the necessity for estimating the;amount of shrinkage and making the cylinders different sizes toaccommodate that shrink. Other objects and advantages of the inventionwill appear hereinafter.

Reference is to be had to the accompanying drawings, in which he figureis a diagrammatic view of an 'aoointaglio printing press illustrating apreferred embodiment of this invention.

In the intaglio printing process itis necessary to dry the ink on thepaper immediately after each impression. This is generally done bypassing. the web around heated drums which revolve at the speed of theweb and'dry the latter while it is in contact therewith. This has atendency to shrink the web while passing between the first and thesecond impression cylinders as well as between the second impressioncylin- This causes a considerable lack of register between the first andsecond impression'cylinders, as the length of a paper is considerablyshorter before entering the second impression cylinder, than it is afterleaving the first impression cylinder.

To compensate for this, it has been the trade custom toreduce thediameter of the second impression cylinder over that of the first, theamount of the reduction being proportional to the shrinkage produced bythe heating action of the drums. This, of course, is merely acompromise, as it is difii cult to predetermine the amount of shrinkwhich is produced under varying atmospheric conditionsand is thereforethe cause biz-considerable annoyance to the printer. It is my purpose toshrink the paper before'it is sent through the first pair of cylinders,so that'both the lmpression cy m;

-dersmay be made of the same diameterand thereby taketheguessworklout ofthe registering'of the first with the secondimpression. I accomplishthis bypassing the web .W

from the aperiroll R over a.heated. 1d rum D b6fOI 'Q lt enters thefirst printing couple consisting.- of the impression cylinder I, and theprinting cylinder I. This heated drum is inked. The [result is that theweb is thoroughly dried before it, receivesfthe impression and there isno tendency to shrink the web while passing, between the first. andvsecond impressioncylinders. I

Also to keep the web in the same condition while passing to the secondimpression cylinder and to the folder I provide a drum D for heating'anddr ing the web, after its first impression an im ression, also to keepthe condition of the we constant as to dryness, I pass it over athirdheating drum D when it leaves the before its second may be a"hollow drum, heated by steam-101" other. meansjandit dries thepaperbefore itsecond rintlng couple and before it passes to the older.

I also prefer to moisten the web as it passes from the web roll to thefirst drying drum in order to make the drying process more effective tosecure uniform s rmkage.

For this purpose I provide water fountams" F and rolls B for applyinmoisture to both sides of the web just be ore it'reaches the firstdrying drum D.

In this way the shrinkage of the web while passingjfrom one printingpoint tothe next and from the last printing point to the folder is doneaway with and reduction in the diameter of the second impressioncylinder, which hasbeen necessary heretofore on account of theshrinking, is also eliminated. V The two impressions register with eachother and the web, when it reaches the folder, is at aconstant andproperlength because shrinkage has been taken care of before it reaches thefolder. This enables me to provide anintaglio print with a print-- incouple having the proper diameters of cy inders and enables me toprovide the i i 2 i w 1,7ee,eaa

impressions in exactly the right place and the folds at the properdistances apart along the web.

Althou h I have illustrated and described only one orm of the inventionI am aware of the fact that modifications .can be made therein by anyrson skilled in the art with- ,out'departing rom the sco of theinvention as expressed in the claims. Therefore, m I do not wish to belimited in these respects,

but what I.do claim is: 1. In an inta lio printing machine, the,

combination wit two printing couples,"-of

7 means for 'ng the web to shrink it v 4 1 i thoroughlybe ore it passesthrough the first ,1 r Y n r f r printing cou 1e and means formoistening V 1 the web just before it is thus first dried.

2. In an inta lio printing machine gthfl combination with two printingcou les of means for drying the web to shrink it thoroughly before itpasses through the first printing couple, means for moistening the web'ust before it isthus first dried, means for rying the web in its.course between 2 the first printing couple, and the .secondprintmcouple, and means for drying the v web a r it passes the second printingl couple and before it passes to the f der. Y I I l In testimony whereofI have hereunto '0 afiixed my si ature.

0s AR CHARLES ROESEN.

